|Parameter|EN57|EN71|EW58|
|---|---|---|---|
|Top speed|110 km/h|110 km/h|120 km/h|
|Power (at h)|740 kW|1480 kW|1864 kW|
|Constant power|608 kW|1216 kW|1648 kW|
|Top acceleration|0,5 m/s²|0,6 m/s²|0,9 m/s²|
|Max. axle pressure|14,3 t|14,3 t|13,0 t|
|Car weight|57 + 2 x 34 t|2 x 57 + 2 x 34 t|42 + 2 x 52 t|
|Wheel diameter (driving/non driving)|1000/940 mm|1000/940 mm|1000/920 mm|
|Car length (external + internal)|20700 + 21570 mm|20700 + 21570 mm|21130 + 20940 mm|
|Places (seating/standing)|212/468|288/624|212/352|
|Number of cars in unit|3|4|3|
|Traction scheme (m-motor, d-motorman's cabin, n-no cabin/motor)|d-m-d|d-m-m-d|dm-n-dm|
|Number of doors per car per side|2|2|3|

Question: how many cars in a unit will the en71 accommodate?
Answer: 4